VDB-210419 · CVE-2022-31766 · ssa-697140

Siemens SCALANCE M804PB TCP Event Service denial of service

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in Siemens SCALANCE M804PB, SCALANCE M812-1 ADSL-Router, SCALANCE M816-1 ADSL-Router, SCALANCE M826-2 SHDSL-Router, SCALANCE M874-2, SCALANCE M874-3, SCALANCE M876-3, SCALANCE M876-4, SCALANCE MUM853-1, SCALANCE MUM856-1, SCALANCE S615, SCALANCE WAM763-1, SCALANCE WAM766-1, SCALANCE WAM766-1 6GHz, SCALANCE WAM766-1 EEC, SCALANCE WAM766-1 EEC 6GHz, SCALANCE WUM763-1, SCALANCE WUM766-1 and SCALANCE WUM766-1 6GHz. Affected by this vulnerability is an unknown functionality of the component TCP Event Service. The manipulation leads to denial of service. This vulnerability is traded as CVE-2022-31766. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Siemens SCALANCE M804PB, SCALANCE M812-1 ADSL-Router, SCALANCE M816-1 ADSL-Router, SCALANCE M826-2 SHDSL-Router, SCALANCE M874-2, SCALANCE M874-3, SCALANCE M876-3, SCALANCE M876-4, SCALANCE MUM853-1, SCALANCE MUM856-1, SCALANCE S615, SCALANCE WAM763-1, SCALANCE WAM766-1, SCALANCE WAM766-1 6GHz, SCALANCE WAM766-1 EEC, SCALANCE WAM766-1 EEC 6GHz, SCALANCE WUM763-1, SCALANCE WUM766-1 and SCALANCE WUM766-1 6GHz (Router Operating System). It has been rated as problematic. This issue affects some unknown processing of the component TCP Event Service. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

A vulnerability has been identified in RUGGEDCOM RM1224 LTE(4G) EU (All versions < V7.1.2), RUGGEDCOM RM1224 LTE(4G) NAM (All versions < V7.1.2), SCALANCE M804PB (All versions < V7.1.2), SCALANCE M812-1 ADSL-Router (Annex A) (All versions < V7.1.2), SCALANCE M812-1 ADSL-Router (Annex B) (All versions < V7.1.2), SCALANCE M816-1 ADSL-Router (Annex A) (All versions < V7.1.2), SCALANCE M816-1 ADSL-Router (Annex B) (All versions < V7.1.2), SCALANCE M826-2 SHDSL-Router (All versions < V7.1.2), SCALANCE M874-2 (All versions < V7.1.2), SCALANCE M874-3 (All versions < V7.1.2), SCALANCE M876-3 (EVDO) (All versions < V7.1.2), SCALANCE M876-3 (ROK) (All versions < V7.1.2), SCALANCE M876-4 (EU) (All versions < V7.1.2), SCALANCE M876-4 (NAM) (All versions < V7.1.2), SCALANCE MUM853-1 (EU) (All versions < V7.1.2), SCALANCE MUM856-1 (EU) (All versions < V7.1.2), SCALANCE MUM856-1 (RoW) (All versions < V7.1.2), SCALANCE S615 (All versions < V7.1.2), SCALANCE WAM763-1 (All versions >= V1.1.0), SCALANCE WAM766-1 (All versions >= V1.1.0), SCALANCE WAM766-1 (All versions >= V1.1.0), SCALANCE WAM766-1 6GHz (All versions >= V1.1.0), SCALANCE WAM766-1 EEC (All versions >= V1.1.0), SCALANCE WAM766-1 EEC (All versions >= V1.1.0), SCALANCE WAM766-1 EEC 6GHz (All versions >= V1.1.0), SCALANCE WUM763-1 (All versions >= V1.1.0), SCALANCE WUM763-1 (All versions >= V1.1.0), SCALANCE WUM766-1 (All versions >= V1.1.0), SCALANCE WUM766-1 (All versions >= V1.1.0), SCALANCE WUM766-1 6GHz (All versions >= V1.1.0). Affected devices with TCP Event service enabled do not properly handle malformed packets. This could allow an unauthenticated remote attacker to cause a denial of service and reboot the device thus possibly affecting other network resources.

The weakness was shared 10/11/2022 as ssa-697140. It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2022-31766 since 05/27/2022. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Router Operating System

Vendor

Siemens

Name

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/27/2022 🔍
10/11/2022 +137 days 🔍
10/11/2022 +0 days 🔍
02/11/2025 +854 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-697140
Status: Confirmed

CVE: CVE-2022-31766 (🔍)
GCVE (CVE): GCVE-0-2022-31766
GCVE (VulDB): GCVE-100-210419

Entryinfo

Created: 10/11/2022 16:02
Updated: 02/11/2025 17:21
Changes: 10/11/2022 16:02 (40), 11/05/2022 08:24 (11), 02/11/2025 17:21 (26)
Complete: 🔍
Cache ID: 216::103